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A CFD-based integral pump-down model for computing solids transfer from a mixing vessel

A method to decrease the modeling time for a computational fluid dynamics (CFD) simulation of the pump-out process of a multi-constituent, radioactive slurry in a mixing vessel is developed. Although a true CFD simulation of transferring such slurry from a vessel is possible, the process requires the simulation of about a 5- to 10-hour process (realtime). To reduce this time, a method is developed based on extracting information from CFD models at discrete stages during the vessel pump-down process. These discrete CFD models are used to feed a control-volume analysis.

The result is the reduction in the computational time by 80 to 90 percent, while retaining the ability to compute the waste contents of each constituent through the pump-down process to high accuracy (< 4 percent error in mass transferred from a vessel).Current efforts are evaluating the coupling of CFD models with seven inhomogeneous phases. The overall result is a more efficient and effective CFD model that represents a true CFD simulation of a vessel pump down to high accuracy.

To obtain a copy of the paper

Proceedings of the 20th International Conference on Nuclear Engineering, ICONE20

Authors

Michael Kinzel
Joel Peltier
Brigette Rosendall
Andri Rizhakov
Kelly Knight

Published

July 3–August 3, 2012
Proceedings of the 20th International Conference on Nuclear Engineering, ICONE20
Anaheim, California, USA